Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Additional Information (Detail)

v3.21.1
Long-Term Debt - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2021
Feb. 02, 2021
Jul. 13, 2020
Dec. 20, 2019
Sep. 30, 2019
May 02, 2019
Mar. 18, 2019
Feb. 05, 2019
Mar. 31, 2021
Mar. 31, 2020
Apr. 04, 2021
Dec. 31, 2020
Mar. 31, 2019
May 14, 2018
Debt Instrument [Line Items]                            
Interest expense                 $ 400 $ 2,200        
Accretion expense                 4,852 4,004        
Long term debt default amount principal $ 97,500               97,500          
Secured debt long term fair value 198,621               198,621     $ 189,363    
Unamortized debt issuance costs $ 3,600               $ 3,600     $ 3,500    
Class of warrants or rights exercise price per share $ 4.24               $ 4.24     $ 4.06    
Cash balance $ 13,692               $ 13,692     $ 11,015    
Payment In Kind [Member]                            
Debt Instrument [Line Items]                            
Percentage of total interest that can be paid through cash or in kind route             50.00%              
Private Placement [Member] | March 2019 Equity Warrants [Member]                            
Debt Instrument [Line Items]                            
Interest rate on secured notes 8.00%               8.00%       8.00%  
Debt instrument terms of interest payment             payable quarterly              
Class of warrants or rights number of shares covered by warrants or rights             2,177,291              
Class of warrants or rights exercise price per share             $ 6.43              
Class of warrant or rights expiry date             Mar. 15, 2022              
Private Placement [Member] | May 2019 Equity Warrants [Member]                            
Debt Instrument [Line Items]                            
Debt instrument maturity date           Mar. 15, 2023                
Debt instrument terms of interest payment           payable quarterly                
Class of warrants or rights number of shares covered by warrants or rights           1,555,207                
Class of warrants or rights exercise price per share           $ 6.43                
Private Placement [Member] | In Cash [Member] | March 2019 Equity Warrants [Member]                            
Debt Instrument [Line Items]                            
Percentage of total interest that can be paid through cash or in kind route             50.00%              
Private Placement [Member] | Payment In Kind [Member] | March 2019 Equity Warrants [Member]                            
Debt Instrument [Line Items]                            
Percentage of total interest that can be paid through cash or in kind route             50.00%              
I Anthus New Jersey LLC [Member]                            
Debt Instrument [Line Items]                            
Description about qualified financing                 “Qualified Financing” means a transaction or series of related transactions resulting in net proceeds to us of not less than $10 million from the subscription of our securities, including, but not limited to, a private placement or rights offering.          
Threshold limit of qualified financing, net proceeds not less than the subscription of securities                 $ 10,000          
Secured Debt [Member]                            
Debt Instrument [Line Items]                            
Long term debt exit fee payable $ 10,000               10,000          
Secured Debt [Member] | Tranche One [Member]                            
Debt Instrument [Line Items]                            
Debt instrument face value                           $ 40,000
Debt instrument conversion price per share                           $ 3.08
Debt instrument beneficial conversion feature 7,900                          
Interest expense                 1,700 1,400        
Accretion expense                 2,300 2,000        
Long term debt default amount principal 97,500               97,500   $ 60,000      
Long term debt default amount accrued interest 19,000               19,000   $ 6,000      
Long term debt exit fee payable principal and interest 14,200               14,200 12,500        
Long term debt exit fee payable 10,300               10,300 10,300        
Interest expenses incurred on exit fees                 3,900 2,200        
Interest payable on exit fee $ 3,900               $ 3,900 2,200        
Debt instrument financial covenant description                 The terms also contain a financial covenant requiring the Company’s asset value to be 1.75 times the total net debt at each quarter end and maintain a minimum cash balance of $1.0 million while the Tranche One Secured Notes remain outstanding (the “market value test”).          
Financial covenant requires to maintain ratio of asset value to net debt 1.75               1.75          
Cash balance $ 1,000               $ 1,000          
Secured Debt [Member] | Tranche One [Member] | Accretion Expense [Member]                            
Debt Instrument [Line Items]                            
Amortization of debt discount                 700 700        
Secured Debt [Member] | Tranche Two [Member]                            
Debt Instrument [Line Items]                            
Debt instrument face value         $ 20,000                  
Debt instrument maturity date         May 14, 2021                  
Interest rate on secured notes         13.00%                  
Interest expense                 800 700        
Accretion expense                 500 400        
Secured Debt [Member] | Tranche Three [Member]                            
Debt Instrument [Line Items]                            
Debt instrument face value       $ 36,200                    
Debt instrument maturity date       May 14, 2021                    
Interest rate on secured notes       13.00%                    
Interest expense                 1,400 1,200        
Accretion expense                 1,100 1,000        
Secured Debt [Member] | Tranche Four [Member]                            
Debt Instrument [Line Items]                            
Debt instrument face value     $ 14,700                      
Debt instrument maturity date     Jul. 13, 2025                      
Interest expense                 300 0        
Accretion expense                 100        
Debt instrument original issue discount percentage     8.00%                      
Escrow deposit 0               0     400    
New Jersey Senior Secured Bridge Notes [Member] | I Anthus New Jersey LLC [Member]                            
Debt Instrument [Line Items]                            
Debt instrument face value   $ 11,000                        
Debt instrument maturity date   Feb. 02, 2023                        
Interest rate on secured notes   14.00%                        
Interest expense                 200 0        
Accretion expense                 100 $ 0        
Secured debt long term fair value   $ 10,300                        
Unamortized debt issuance costs   $ 700                        
Escrow deposit $ 8,400               8,400     $ 0    
New Jersey Senior Secured Bridge Notes [Member] | Prospective Recapitalization Transaction [Member] | I Anthus New Jersey LLC [Member]                            
Debt Instrument [Line Items]                            
Interest rate on secured notes   8.00%                        
New Jersey Senior Secured Bridge Notes [Member] | Prospective Default [Member] | I Anthus New Jersey LLC [Member]                            
Debt Instrument [Line Items]                            
Interest rate on secured notes   25.00%                        
March 2019 Debentures [Member] | Private Placement [Member]                            
Debt Instrument [Line Items]                            
Debt instrument face value             $ 35,000              
Debt instrument maturity date             Mar. 15, 2023              
Interest rate on secured notes                   8.00%        
Interest expense                 700 $ 700        
Accretion expense                 $ 400 $ 300        
March 2019 Debentures [Member] | Private Placement [Member] | In Cash [Member]                            
Debt Instrument [Line Items]                            
Percentage of total interest that can be paid through cash or in kind route             50.00%              
May 2019 Debentures [Member] | Private Placement [Member]                            
Debt Instrument [Line Items]                            
Debt instrument face value           $ 25,000                
Interest rate on secured notes 8.00%               8.00% 8.00%        
Interest expense                 $ 500 $ 500        
Accretion expense                 $ 200 $ 200        
May 2019 Debentures [Member] | Private Placement [Member] | Payment In Kind [Member]                            
Debt Instrument [Line Items]                            
Percentage of total interest that can be paid through cash or in kind route             50.00%              
Stavola Trust Note [Member]                            
Debt Instrument [Line Items]                            
Debt instrument maturity date               Jan. 19, 2020            
Business combination liablity assumed non current debt               $ 10,800            
Related party transaction rate of interest               8.00%